User's Guide Part 2

Chapter 5: Installation Safety
Minimum separation distances
Ensure that personnel are not exposed to unsafe levels of RF energy. The units start to radiate
RF energy as soon as they are powered up. Never work in front of the antenna when the ODU
is powered. Install the ODUs so as to provide and maintain the minimum separation distances
from all persons. For minimum separation distances, see Calculated distances on page 4-24.
Grounding and lightning protection requirements
Ensure that the installation meets the requirements defined in Grounding and lightning
protection on page 3-11.
Grounding cable installation methods
To provide effective protection against lightning induced surges, observe these requirements:
• Grounding conductor runs are as short, straight and smooth as possible, with bends and
curves kept to a minimum.
• Grounding cables must not be installed with drip loops.
• All bends must have a minimum radius of 200 mm (8 in) and a minimum angle of 90°. A
diagonal run is preferable to a bend, even though it does not follow the contour or run
parallel to the supporting structure.
• All bends, curves and connections must be routed towards the grounding electrode
system, ground rod, or ground bar.
• Grounding conductors must be securely fastened.
• Braided grounding conductors must not be used.
• Approved bonding techniques must be used for the connection of dissimilar metals.
Siting ODUs and antennas
ODUs, external antennas and GPS receivers for PTP-SYNC are not designed to survive direct
lightning strikes. For this reason they must be installed in Zone B as defined in Lightning
protection zones on page 3-11. Mounting in Zone A may put equipment, structures and life at
risk.
Thermal Safety
The ODU enclosure may be hot to the touch when in operation. The ODU must not be operated
in ambient temperatures exceeding 40°C unless mounted in a Restricted Access Location. For
more information, see ODU ambient temperature limits on page 3-13.
Page 5-4